Friction-clutch.



PATENTED JUNE 5, 1906.

1 DE F. HUBBARD.

LQGTION CLUTCH.

APPLICATION FILED JULY11,1904.

2 SHBETS-SHEET 1 No. 822,454 PATENTED JUNE 5, 1906. H. DE 3?. HUBBARD.

PRIGTION CLUTCH APPLICATION FILED JULYH, 1904.

2 SHEBTSSHEET Ff 9 i 4% airway I 1 [u i TV IV of Fig. 1.

- srAr-Es PATENT OFFICE. I

FRICTION-CLUTCH.

Specification of Letters Patent.

Patented June 5, 1906.

Application filed uly 11. 1904. Serial No. 215,988.

To all whom ifmay concern.-

Beit known that I, HENRY DE F. HUBBARD, a citizen of the United States, residing at Avalon, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Friction- Clutch'es, of which the following is a specification, reference being had therein to the accompanyingdrawings, forming part of this specification, in which Figure 1' is a face View of my improved friction-clutch, the shaft and bracket-hub being shown in section. Fig. 2 is a plan View of Fig. 1, showing similar parts in horizontal section. Fi 3 is a partial detail showing the internal ction-shoes made in one piece. Fig. 4 is a vertical sectional view onthe line the line V V of Fig. 1. Fig. (Sis a partial detail view similar to Fig. 1, showing a modified arran ement of the operatinglevers.

Fig. 7 is a detail view showing a modified construction of lever-actuating mechanism.

-My invention relates to the class of band' friction-clutches, its object being to transmit motion from a constantly-revolving shaft to an intermittently-operated element, as a pulley. or geai' wheel; and the object of the invention is to provide a mechanism in which the friction clutching devices are' brought into contact, so as to transmit movement gradually without sudden shock and also to provide means whereby inner and outer clutches may be applied to corresponding surfaces of the driven member with equa pressure.

Referring to the drawings, 2 is the shaft of a constantly-rotating engine or other prime mover or 'source of power, upon which is freely-journaled the friction-pulley 3, having the peripheral-flange 4, the inner and outer surfaces of which; are finished smooth and v adapted to provide friction-surfaces for the power transmitting elements of the device.

It will be understood that the pulley 3 is connected with or made a part 0 any suitable gearing through which it is de'signedto intermittently utilize the power of shaft 2 as, for instance, the toothed gearing. (Indicated in dotted lines in Fig. 4.)

To the outer end of shaft 2 or'toany suitable ortion is keyed or otherwise secured the brac et 5, having a suitable hub 6, said bracket being connected to or formed interal with an outer frictional circular clutchband 7, preferably somewhat tapered toward Fig. 5 is across-section on of resiliency, and terminating in reinforced eyes 8, to which the operating-levers are conneeted either directly or by links 9.

Pivoted to bolts 10, mounted i 5, are the inner friction-shoes 11 11, the outer bracket each extremity, as shown in Fig. 1, to permit faces of which are adapted to interfit and make binding engagement with the inner periphery of the flange 4, said shoes extending along on each side of connections 10 and terminating closely adjacent to each other at the opposite side in eyes 12.

13 13 are the oppositely-acting levers, each of which is c-onnectedby bolts or pins 14114 and 15 15,'re'spectively, With the terminals of band 7 and shoes 11 on the outerand inner.-

sides of theifiange 4. As thus arranged it will be seen that if' the outer extremity of levers-13 are forced apart the bearing: bolts 15 will press shoes 11- outwardly into.

through openings in the hub 6 and shaft 2.

The bolts 16 are thus provided 'withsh'oul ders at their inner ends which limit their inward travel. ends of lever 13 and provided with lock nuts 18, so as to provide for adjustment of.the outer ends of the leversand locking'the bolts in such adjusted osition. By this construction the clutch-e ements may be set so as to the lovers 13; The outer end of shaft, 2 hollow, as indicated at 19, and adapted to receive in said hollow cavity a longitudinallym vable bolt or pin 20, terminating at its inner end in a wed e-point 21, adapted to be pressed inwardly ymeans of a lever 22 and The bolts are threaded in the require but a minimum amount of travel .of

suitable connections or other convenient means, so as to enter between the inner ends of pins 17. As the Wedge-point 21 is pressed inwardly the outer ends of the levers 13 separated, and the chitch-band7 and Shoes 1 1 are simultaneously brought into engagement with the outer and inner surfaces of the flange 4. By reason of the double connection of the lever it will be seen that an e nilibrium of pressure is secured, s0 ihatal of the clutch elements are applied equally;

For the purpose of assisting in quickly i For the purpose of insuring free movement of merit a bracket 29 is secure Ito'an'upwardlyment w erein the friction-shoes i1 11 (-onor bolts This construction is simpler I than that shown in Fig. 1, and asthemternal friction-shoes are in one piece there sufi viated.

' withdrawing of wed e 31.- By either of these 4 constructionsit wil be seen that-equal presclutch membersandgthat the entire device 1t is desired to communicate power intermitthe cone'at each side, as shown. -'Whcn the tion, -or the various details 0 the device arms 31 of which bracket extend outwardly ,over the heads 32fof pins or bolts 28 with is bo ts with the shoes 11.

enghne. a Fig. 7 I have'shown amodified mechan- I ism for actuating the levers,=- consisting in a I outside of hub-6; k-This cone is actuated by aseparating thezshoes 11 and also band 7 from contact whenwedge 21 is withdrawn a pressure-spring 23 is provided, bearin outwardly at one en against a washer an nut 24 on rod25 and at the other end'against a flanged end 26 of a bar 27.

The rod 25 and bar 27 are mounted between the'sides of shoes 11 upon pins 28.

these pins and of preventin their disengageextending portion 30 of the bracket 5, the

sli ht clearance to permit of movement of the .InFi 31 have shown a modifi d arrangestitute the free opposite terminals of'onefcontmuous piece, secured in bracket 5 by studs ficient' resiliency to spring inwardly from contact withlthe flange 4 -u pon'relieving outward ressure offthe' levers 13. v The spring 23' an the other connections are thereby ob- In F 6 I have shown a modified arrangement w ereinl employ-with'thelevers 13 an ivoted at tween bolts this construction liprovide a tension spring assist in. freeing the: clutch elements upon sure is -applied to bothlthe inner and outermay be delicately adjusted, so as to act freely wit a minimum amount of, movement of the operat" leve'r. Theinvention is especially applicab e to oi1-well engines, pumpingen gines or any type'of prime mover from which tently during the constant operation of the hollow coniform wedge 20', mounted on the lever 22 in the same manner-as already described, theadjustable bolt extremities 17 being somewhat shorter and bearing upon cone is adjusted by the lever, motion will be imparted to the lever-arms 131 and the brake applied in the same manner as already de scribed.

. Changes and variations may be made by the skilled mechanic in the desi n, construcsaid flanged member, an

without departing from my invention, and all such changes are to be considered as within the scope of the following claims.

\Vhat lclaim is 1. A friction-clutch comprising a normally stationary loosely-journaled flanged member adapted to communicate motion, a normally rotating member provided "with an outer clutch-band, inner clutch-shoes, and two oppositely-acting operating-levers connected with the terminals of said clutch-band and shoes respectively, with means for actuating the levers, substmitially as set'forth.

' 2. A friction-clutch comprising a normally stationary loosely-journalled flanged member adapted to communicate motion, a nonnally rotating member provided with an outer cluwh-band, innerclutch-shoes, and two oppositely-acting operating-lovers connected with the terminals of said clutch band and shoes l0sp(=('t-i\(':l with means for actuating the levers and for relieving the clutch elcments from contact, substantially as set forth.

A fflction-clutch comprising a normally stationaryloosely journaled flanged member adapted to communicate motion, a normally rotating nieinbcr provided with an outer clutch-band and inner clutch-shoes, and op posit'ely acting operating-levers connected with. the terminals of said clutch-band and shoes respectively, provided with inwardlyextending pins, and a tapered wedge adapted to be inserted between said pins to separate the levers, substantially as set forth.

- 4. A friction-clutch comprising a normally stationary loosely-journaled flanged member rotating member secured to said shaft provid'ed with an outer circular clutch-band and inner clutch-shoes adapted to make contact with the outer and inner eripheral'faccs of rfoppositely-acting levers connected with the terminals of said clutch band and shoes respectively, provided with bearing-pins, and an adjustable separating-wedge mounted in the shaft-cavity with means for actuating said wedge, substantially as set forth. g 6. A friction-clutch comprising a hollow shaft, a normally stationary flanged member loosely j ournaled upon said shaft, a normally rotating member secured to said shaft prothe n n m vided With an outer circular clutcl -hand and inner clutch-shoes adapted to make contact with the outer and inner peripheral. faces of said flanged member, oppositely-acting le vers connected With the terminals of said clutch band and shoes respectively, means for actuating the levers, With spring devices adapted to Withdraw the inner shoes from contact, substantially as set forth.

7. In combination with a rotating shaft provided with a central cavity and a separat lng-wedge mounted therein, a freely-j ournaled rotating element provided with a peripheral fiangega rotating bracket secured to the shafthaving' an outer circular clutch-band adapted to engage the outer surface of the flanged periphery, inner circular shoes, mounted in racket and adapted to engage the inner eriphery of the flange and oppositely-acting evers connected With-the terminals of said band, and shoes respectively, and means for actuating said levers, substantially as set forth.

8. In combination with a rotating shaft provided with a central cavity and separating-wedge mounted therein, a' freely-journaled rotating element provided with a peripheral flange, a rotating bracket secured to the shaft having an outer circular clutchband adapted to engage the outer surface of the flanged periphery, inner circular shoes mounted in the bracket-and adapted to engage the inner periphery of the flange, and oppositely-acting levers connected With the terminals of said hand and shoes respectively, and provided with adjusting-pins extending into the central cavity of the shaft and adapted to be separated by the Wedge, substantially as set forth.

9. In combination With a rotating shaft provided with a central cavity and a separatmgqvedge mounted therein, a freely-journa ed rotating element provided with adpe l ripheral. flange, a rotating bracket secure the shaft having an outer circular clutch Lac) band adapted to the on surface of the flanged periphery, inner curved shoes ex tending oppositely from the bracket and adapted to engage the inner periphery of the flange, and oppositelyncting levers connected with the terminals of said band and shoe terminals respectively, means for actuating the levers, and spring-bars mounted on pins in the shoes and provided with a retracting-- spring, substantially set forth.

10. in combination with a rotating shaft provided with a central cavity and a separating-vvedge mounted therein, a freelyjournaledrotating element provided. with a peripheral flange, a rotating bracket secured to the shaft having an outer circular clutchband adapted to the outer surface of the flanged periphery, inner curved shoes extending oppositely from the bracket and adapted to engage the inner periphery of the flange, oppositely-acting levers connected with the terminals of said band and shoe ter ininals respectivelv, means for actuating the levers, spring-bar shoes and provided with a retracting-spring, and. arms secured to the bracket and extending over the outer ends of the spring-bar pins, substantially set forth.

ii. In friction clutch, combination with a normally stationary loosely-journled flanged member adapted. to communicate motion, a normally rotating member provided With outerclutchband, inner clutch: shoes, and two oppositely-acting operatinglevers connected with the terminals of said clutch band and shoes respectivelyyof means for relieving the clutch-bands from contact, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

server nn r. HUBBARD.

Witnesses:

O. M. (Jeanne, Jams M00. MILLER.

vmounted on pins in the 

